Hollow brick.



P. 0. ANDERSSON. HOLLOW BRICK. APPLICATION FILED SEPT. 9,1911.

1,041,401 Patented Oct. 15, 1913,

5% 44. L tll D Q) i jgifi. Y

BEANS OSKAR ANDERSSON, 0F STOCKHOLM, SWEDEN.

roar oi.

, Specification of Letters Patent;

HOLLOW BRICK.

Patented Uct.15,1912.

Application filed September 9; 1911. Serial No. 648,524. I

To all whom it may concern:

Be it known that I, FRANs OSKAR AnDERsso), a subject of th King ofSweden, and residing at -Stockho m, Sweden, have invented certain newand useful Improvements in Hollow Bricks, of which the following is aspecification. Y

In-order to prei ent the cold air, coming fromthe outside of awall,-from blendingtoo rapidly with the warnrair, coming from theinside, whereby damp or moisture is'caused, double air-chambers arenecessary in the wall, so as to create two layers of air, iconipletelyseparated from each other. In order to effect this, hollow bricks areused, which consist of three walls, united with each other at their endsby means ofwebs in such a manner that every brickis provided with twoholes or cavities.

the joints are not isolated thereby.

' which complement or receive the formation- 11 of an adjacent brickwhen'the bricks are.

allel walls 4, arranged at a distance fromeach other, and these wallsare connected with each other by means of webs 5 and 6 respectivelyinsuch a manner that every brick is provided with two holes or cavities3. The webs 5 and 6 are formed concaveconcave in cross section anddisposed in such a manner that'in front of eachhole or cavity 3, thebricks are provided with a notch or recess 1, and one margin of eachwall 4 with a convex projection -11. The opposite margin of the walls 4from the convex formation 11 are formed concavely as at 2 being laid forbuilding a wall. When laying the bricks, there are therefore formedbetween two bricks channels ,7, of which those nearest the outer walltogether with holes 3 'nearest to them form an outer chamber,

while the inner chamber 7 and the inner holes '3 form another chamber,completely;

In this .way complete .isolation can,however, not.be effected, as

separated from the former, if the bricks are I bonded. I

I In order to facilitate the bricklaying work,

.the bricks are on their upper and, lower sur- .unaccustomed tobricklaying work, the bricks are dipped in soft mortainon three sides,after'which they are laid in place, which is apparent in Fig. 1. After alayer has been put down in this manner, the next layer is bonded withthe previous one in such a manner that the channels? between two bricksare connected with'the holes 3 in the layers lymg underneath, whereby,as will be seenfrom Fig. 1, a chamber isobtained in which the air cancirculate, and which is only interrupted by the webs 5 and 6respectively. 10

indicates the mortar between the bricks. In this way complete isolationof the air is elfected, as even the bonds are isolated in sucha mannerthat every part of a wall is surrounded by air on all sides. Bricks inconformity with the present invention may also be used for 'theerectionof pillars and reinforcing heels in walls, in which case the bricks arebonded two and two, after which the holes or cavities are filled up withconcrete or similar material and reinforced with iron, if such should benecessary, through which method of procedure an extremely cheap andperfectly safe structure is obtained. In this way the tedious andexpensive molding is obviated.

The bricks may'be made of concrete, sand or any other suitable material.Finally, it ought to be noted that bricks may, of course, also bemanufactured withgmore than two' holes or cavities, in which case thewebs have to be provided with a corresponding number of notches orframes, so as to get as large a number of layers of. air as there areholes or cavities in the bricks.

Having now particularly described the nature of my said invention andin'what manner the same is to be performed I declare that what I claimis:

A wall structure comprising in combination, a plurality of bondedelements each comprising in combination, a plurality of parallel walls(4),each wall having opposite vertical margins formed convexly andconelongated cavities (3) cavely 11 and 2 respectively, and a pluralltyof Webs (5) concavo-concave in cross sectlon separating said walls anddisposed adjacent the said concave and convex mar gins, parallel theretoand in spaced apart relation to each other, to provide an elongatedcavity (3) between elements being disposed in staggered superposedrelation to each other with'the said intercommunicating with each other,and alin'ed cylindrical the Walls, said bonded cavities (7) eachalternate row of elements formed by the margins of said concavo concaveWebs, substantially as and for the purpose set forth. I t

In testimony whereof I afiix my signature in presence of two Witnesses.

. FRANS OSKAB .ANDERSSON.

I Witnesses:

J orrAN MARK AN; 'I'IILDEN TEMLING.

